Fix an annoying off-by-one in the row selection in the diff viewer where the first line selected will be un-highlighted when selecting a third row.
Fix an annoying off-by-one in the row selection in the diff viewer where the first line selected will be un-highlighted when selecting a third row.




chazy/reviewboard,KnowNo/reviewboard,bkochendorfer/reviewboard,atagar/ReviewBoard,Khan/reviewboard,chazy/reviewboard,1tush/reviewboard,bkochendorfer/reviewboard,atagar/ReviewBoard,chazy/reviewboard,chazy/reviewboard,chazy/reviewboard,custode/reviewboard,chipx86/reviewboard,atagar/ReviewBoard,atagar/ReviewBoard,chazy/reviewboard,reviewboard/reviewboard,bkochendorfer/reviewboard,1tush/reviewboard,1tush/reviewboard,KnowNo/reviewboard,sgallagher/reviewboard,atagar/ReviewBoard,davidt/reviewboard,brennie/reviewboard,bkochendorfer/reviewboard,brennie/reviewboard,chipx86/reviewboard,davidt/reviewboard,Khan/reviewboard,asutherland/opc-reviewboard,reviewboard/reviewboard,atagar/ReviewBoard,chipx86/reviewboard,KnowNo/reviewboard,1tush/reviewboard,custode/reviewboard,sgallagher/reviewboard,beol/reviewboard,custode/reviewboard,Khan/reviewboard,sgallagher/reviewboard,chipx86/reviewboard,custode/reviewboard,reviewboard/reviewboard,Khan/reviewboard,davidt/reviewboard,brennie/reviewboard,chazy/reviewboard,atagar/ReviewBoard,asutherland/opc-reviewboard,1tush/reviewboard,1tush/reviewboard,davidt/reviewboard,KnowNo/reviewboard,atagar/ReviewBoard,Khan/reviewboard,chazy/reviewboard,asutherland/opc-reviewboard,1tush/reviewboard,atagar/ReviewBoard,beol/reviewboard,brennie/reviewboard,beol/reviewboard,beol/reviewboard,Khan/reviewboard,1tush/reviewboard,asutherland/opc-reviewboard,chazy/reviewboard,1tush/reviewboard,sgallagher/reviewboard,Khan/reviewboard,Khan/reviewboard,Khan/reviewboard,reviewboard/reviewboard